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Homephp教程PHP源码用JavaScript PHP随机显示图片

<script>ec(2);</script>

想必你会用javascript随机显示图片。但假如图片的资料(比如链接)是经常变化,或是由用户修改、增加的,怎么办?我这里有个办法。
把图片的资料(如名称、地址、链接等)放在一个TXT文件里(如有MYSQL更好,没有也罢)。HTML文件中由javascript调用PHP程序, PHP程序随机读取图片资料。

readrand.php(此程序实际上是生成一句javascript语言)

$arrayall=file("tp.txt");读出tp.txt内容到数组
$arrays=count($arrayall);
if ($arrays==1){//because rand(0,0) is wrong
$selectrand=0;
}else{
srand((double)microtime()*1000000);//设定随机数种子
$selectrand=rand(0,$arrays-1);
}
$exstr=explode(chr(9),$arrayall[$selectrand]);//从全部中随机取出一个并分割
?>
document.write('<? echo $exstr[0];?>');

HTML文件





(你可以把scripty放到你需要的位置,并可以加入setTimeout()函数以实现定时刷新)
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